Control valve device



wg 9, 19321. E. K. LYNN 1,870,856

CONTROL VALVE DEVICE Filed May 24, 19:50

INVEN-on EWING K LYNN y /2 my@ Patented Aug. 9, 1932 Iren STATES EWING- K. LYNN, OF EAST MCKEESPORT, PENNSYLVANIA, ASSIGNOR TO THE WESTING- HOUSE AIR BRAKE COMPANY, OF WILMERDING, PENNSYLVANIA, vA CORPORATION OF PENNSYLVANIA Y Applicationpfiiea May 24,

above character in which reduct-ions in brake pipe pressure can bev accurately controlled and in which the possibility of leakage of fluid under pressure to the atmosphere is reduced to a minimum.

Other objects and advantages will be apparent from the followingmore detailed description of my invention.

In the accompanying drawing; Fig.` 1 is a side elevational view, partly in section, of my improved conductors valve device; Fig. 2 is a side elevational view, partly in section, and taken at right angles to the view shown in Fig. 1; Fig. 8 is a section on the line 3-,-3 of Fig. 2; Fig. 4 is a section on the line 44 of Fig. 2; and Fig. 5 is a diagrammatic view of a iuid pressure brake equipment having my improved conductors valve connected thereto.

As shown in the drawing, the conductors valve device may comprise a body portion 1 having an inletl passage 2 and an outlet passage 3 separated by a partition wall 4. An annular seat rib 5 surrounds the outlet face of passage 2, and a flexible diaphragm 6 is adapted to engage said seat rib for controlling communication from passage 2 to passage 3. Said diaphragm is clamped in position on the body portion by a cover portion 7.

Contained in a chamber of the cover portion 7 is a hollow cylindrical member 8, in the bore of which ismounted a coil spring 9. One end of the spring engages a disc 10, which is locked in place by a spring ring 11 engaging in a groove in said member 8. The other end of the spring engages a movable block 12 which engages a follower 13, said follower being in engagement with the diaphragm 6. The member 8 is vprovided with external screw threads 14 'andan operating handle 15 has screw-threaded engagement with the threads 14. y i l The cover portion 7 is provided with a boncoivfrnor.l VALVE DEVICE 1930. semi No. 455,290.

net 16 which extends over the outer end of the member 8 and forms an opening 17 to permit rotation of the handle 15 on the member 8, the degree of rotation being limited by engagement of said handle with surfaces 18 and 19 lof said bonnet. A slot 20 isprovided at the inner end of the member 8Yfor receiving a pro` jection 21 on a bushing 22 secured to the cover portion 7 preferably by a set screw 23. Within the slot, the projection 21 is adapted to be engaged by the member 8 so as to prevent rotational movement of said member, the slot being of sufficient length to permit relative longitudinal movement between the member Sand the cover 7. Y i

Referring. to Fig. 2, a branchpassage '24l extends from the passage 2 to the whistle portion of the valve device, lsaid whistle portion being preferably associated with the body 1. The whistle portion may comprise a hollow cylindrical part 25 which, at 'one end, has screw-threaded engagement with the body 1. Mounted Vin this end of the cylindrical part 25 is a plug 26 having a central opening 27 therethrough, and a passage 28 formed by cutting a lat face onthe plug l26 andwhich supplies air from a chamber 29 to blow the whistle. .A valve 30 contained in the passage 24 is adapted to control communication between thepassage 24 and the chamber 29, said valve being subject to the pressureof a spring 31, which urges the valve toward its. seat. The valve is provided with a fluted stem, one end of which is adapted to be operatively engaged by the innerl end of a push rod 32 which extends longitudinallyof the whistle and is slidably mounted in the'plug 26V and the cap 33 of the whistle tube 25. The upper end of the push rod extends through the cap and is provided with a push button 34, by means of which the push rod is manually controlled. A pin'35, preferably a cotter pin, is provided in the push rod 32 which, when in engagement with the inner face of the cap 33, limits the upward travel of the push rod and thereby prevents the lower endof said push rod from becoming disengaged from the opening 27 in the plug 26.A

Passage 2 in the conductors valve is adapted to'be connected to the usualV brake pipe 3 42 is connected a iiuid pressure brake of the usual type comprising a triple valve 43, an

auxiliary reservoir 44 and a brake cylinder 45. Passage 3 is connected to a vent pipe 46 which isopen at oneV end to the atmosphere and which may be bent into the form of a hook for suspending the conductors valve device from the platform rail ofa car, not shown in the drawing. Y

In assembling the pressure eXertinOr mem-v bers within the cover ofthe conductors valve device, the screw-threaded end of the handle 15 is inserted in the opening 17 of the cover 7, and is held in full valve open position against the stop 19 while the member 8, containing the spring 9, the disc 10, the spring ring 11, and the movable block 12, is brought into screw-threaded engagement with said handle. Saidmember is turned until it is inY such position that the diaphragm-engaging Jface of the follower 13 is in substanti al align- Inent with the diaphragm seat 36 in the cover 7. Bushing 22 is then placed in position in such manner as to permit the projection 21 to engage the member 8 in the slot 20, after which, said bushing is secured in position by means of the set screw 23. This method of assembling insuresthat, when vthe handle 15 is placed in full valve open position, the diac, phragm 6 will permit unrestricted opening `between the passages 2 and 3.

It will be noted that the conductors valve device may be, readily maintained, since a4 bruised or ruptured diaphragmfmay be replaced by removing merely Vthe cover portion. f

' In, operation, withthebrake pipe charged with fluid under pressure in the usual manner, kif it is desired to apply the brakes by i means of the conductors'valve device, the

handle 15 is rotated toward the left from the closedY position shown in Fig. 2, in which position the diaphragm 6 is held in engagement with the seatV rib '5. VThis rotation, through the screw-threaded engagement between the handle 15 and the member 8, causes saidmember to move away from the diaphragm 6 and thereby relieve the tension of the spring 9 suiiiciently to permit the diaphragm tojbe moved away from itsV seat rib by the pressure of the brake pipe fluid in passage 2. With the diaphragm thus unseated, iiuid under pressure is vented from the brake pipe to the atmosphere through the passage 2, the passage 3, and the vent pipe 46, thereby effecting a reduction in brake pipe pressure and an application of the brakes in the usual manner. The flow areaof the cemmunication between the passages 2:"and 3 maybe varied according to the deflection of the diaphragm 6, so that the rate of brake pipe reduction will be correspondingly varied.V Accurate control of the degree of deiection of the diaphragm is provided through the screw-threaded engagement between the handle and the'member 8.

Y When the desired reduction in brake pipe pressure has been made, the handle 15 is turned toward its closed position, causing the member 8 to move inwardly and exert pressure against the diaphragm V6 through the spring 9, the movableplate 12, and the follower 13. After the diaphragm 6` is thus deflected into engagement with the seat rib 5, further rotation of the handle acts to compress the spring 9 and press said diaphragm into tight engagement with the seat rib 5, thereby preventing leakage of fluid from the passage 2 to the4 passage 3. The closing of the conductors valve device in this manner permits restoration of brake pipe pressure through the operation ofthe usual feed valve device on the locomotive (not shown).

Y I-f/it is desired to'l sound the whistle, the push button 34 is depressed, which causes the push rod 32 to unseat the valve 30 against the pressure of the spring 31 andthereby permit fluid at brake pipe pressure to be supplied to the whistle through the passage 2, the passage 24, the chamber 29, and the passage 28, thereby producing a warning signal in the well known manner. l

d The warning signal may be discontinued by releasing pressure from the push button 34, which permits the spring 31 to urgev the valve to its seat, thereby cutting oil the supply of fluid under pressure to the whistle. While one illustrative embodiment of the invention has been described in detail,it is not my intention to limit its scope tol that em* bodiment or otherwise than by the terms of the appended claims.

Having now described my invention, what I claim as new andA desire to secure by Letters Patent, is:

1. The combination with a back-up hose adapted to be connected to the brake pipe, of an application valve device'connected to said hose and comprising a casing having an inlet and an Outlet passage, a valve seat interposed between said passages, a diaphragm for controlling communication'between said passages and adapted in one position to engage said seat for cuttingfoif communication between-said-'passages, a member mounted in said casing for operating said diaphragm and having external screw-threads, a handle having screw-threaded engagement with said external screw-threads of said member for operating'said member, and a spring inter#- of an application valve device connected to said hose and comprising a casing having an inlet and an outlet passage, a valve seat interposed between said passages, a diaphragm for controlling communication between said passages and adapted in one position to engage said seatfor cutting oti communication between said passages, a member mounted in said casing for operating said diaphragm, a handle having screw-threaded engagement with said member for operating said member, a spring interposed between said member and said diaphragm for resiliently pressing said diaphragm into engagement with said seat, and means for preventing rotative movement of said member.

3. The combination with a back-up hose adapted to be connected to the brake pipe, of an application valve device connected to said hose and comprising a casing having an inlet and an outlet passage, a valve seat interposed between said passages, a diaphragm for controlling communication between said passages and adapted in one position to engage said seat for cutting of communication between said passages, a member mounted in said casing for operating said diaphragm and having a longitudinal slot, means engaging in said slot for preventing rotative movement of said member, a handle having screw-threadedengagement with said member for operating said member, and a spring interposed between said member and said diaphragm for resiliently pressing said diaphragm into engagement with said seat.

t. The combination with a back-up hose adapted to be connected to the brake pipe, of an application valve device connected to said hose and comprising a casing having an inlet and an outlet passage, a valve seat interposed between said pass-ages, a diaphragm for controlling communication between said passages and adapted in one position to engage said seat for cutting of communication between said passages, a member mounted in said casing for operating said diaphragm and having a ylongitudinal slot, means fixed relative to the casing and engaging in said slot for preventing rotative movement of said member, a handle having screw-threaded engagement with said member for opera-ting said member, anda spring interposed between said member and said diaphragm for resiliently pressing said diaphragm into engagement with said seat. y

5. A cock device comprising a casing having an inlet and an outlet passage, a valve seat interposed between said passages, a diaphragm for controlling communication between said passages and adapted in one position to engage said seat for cutting off communication between said passages, a member mounted in said casing for operating said diaphragm and Y having external screwthreads, a handle having screw-threaded engagement with said external screw-threads of said member for operating said member, and a spring interposed between said member and said diaphragm for resiliently pressing said diaphragm into engagement with said seat.

6. A cock device comprising a casing having an inlet and an outlet passage, a valve seat interposed between said passages, a diaphragm for controlling communication Vbetween said passages and adapted in one position to engage said seat for cutting oii communication between said passages, a member mounted in said casing for operating said diaphragm and having external screw threads, a handle having screw-threaded engagement with said external screw threads of said member for operating said member, a spring interposed Ibetween said member and said diaphragm for resiliently pressinosaid diaphragm into engagement with said seat, and means for preventing rotative movement of said member.

7. A cock device comprising a casing having an inlet and an outlet passage, a valve seat interposed between said passages, a diaphragm for controlling communication between said passages and adaptedI in one position to engage said seat for cutting 0E communication between said passages, a member mounted in said casing for operating said diaphragm and having a longitudinal slot, means engaging in said slot for preventing rotative movement of said member, a handle having screw-threaded engagement with said member for operating said member, and a spring interposed between said member and said diaphragm for resiliently pressing said diaphragm into engagement with said seat.

8. A cock device comprising a casing having an inlet and an outlet passage, a valve seat interposed between said passages, a diaphragm for controlling communication between said passages and adapted in one position to engage said seat for cutting off communication between said passages, a member mounted in said casing for operating said diaphragm and having a longitudinal slot, means iixed relative to the casing and engaging in said slotfor preventing rotative movement of saidl member, a handle having screwthreaded enga-gement with said member for operating said member, and a spring interposed between said` member and said diaphragm for resiliently pressing said diaphragm into engagement with said seat.

In testimony whereof I have hereunto set my hand, this 22nd day of May, 1930.

EWING K. LYNN. 

